Apparatus for building up and hardsurfacing cylindrical rollers



2,868,165 UP AND H D-SURFACING L ROLLER 13, 1959 H. A. ALTMAN APPARATUSFOR BUILDING CYLINDRICA Filed Jan. 3, 1956 2 Sheets-Sheet 1 Jan. 13,1959 H. A. ALTMAN 2,868,165

APPARATUS FOR BUILDING UP AND HARD-SURFACING CYLINDRICAL ROLLERS FiledJan. 5, 1956 2 Sheets-Sheet 2 46 fi Z I N VEN TOR.

United States Patent APPARATUS FOR BUILDING UP AND HARD- SURFACINGCYLINDRICAL ROLLERS Hugo A. Altman, Minneapolis, Minn.

Application January 3, 1956, Serial No. 556,843

6 Claims. (Cl. 118-620) This invention relates to methods and apparatusfor refacing crushing roll surfaces without necessitating the removalof. the roll from the crushing machine.

After a period of use, the crushing rolls of an ore or rock crusherbecome worn and deformed. The cylindrical surface of such a roll mustthen be built up again to the original size and shape thereof so as toproperly cooperate with the matching or adjacent roll in crushing oresupplied therebetween. In the past, common practice has been to removethe crusher roll from the ore handling and crushing machine and thentaking the roll to a shop for refacing. Such practice necessitatedshutting down the machine for a substantial period of time while theroll is being taken out and while a replacement roll is mounted.

Because few welding shops have the necessary facilities for handlingsuch large and heavy rolls, they must be taken to a central shop,probably in an urban center many miles from the location of the crushingmachine. The time involved and the loss of work resulting while thecrushing machine is shut down for replacing the rolls thereof, and thetransportation of the rolls over distances for servicing, combine tomake the refacing of crusher roll surfaces a very expensive andinconvenient operation.

With these comments in mind, it is to the elimination of thesedisadvantages in the servicing of crusher rolls to which my invention isdirected, along with the inclusion in my invention of other novel anddesirable features.

An object. of my invention is to provide a new and improved apparatus ofsimple and inexpensive construction and operation for refacing orrebuilding the cylindrical working surface of a rock-crushing roller inan ore handling machine.

Another object of my invention is the provision of a novel mechanism tofacilitate the ready and easy resurfacing and refacing of crushingrollers without necessitating that the rollers be removed from the oreand rock-crushing machine. Still another object of my invention is toprovide an improved apparatus for continuously applying metal by weldingon a worn cylindrical working surface of a crusher roller while theroller remains on the ore crushing machine so as to build up saidsurface and adapt the roller for further service in cushing ore androck.

A further object of my invention is to provide a new and improved methodfor quickly and conveniently resurfacing the worn cylindrical workingsurface of an ore crusher roll. without necessitating the removal of theroll from the crushing machine and thereby effecting a very substantialsavings in the maintaining of the ore crushing machine.

These and other objects and advantages of my invention will .more fullyappear from the following description made in connection with theaccompanying drawings wherein like reference characters refer to thesame parts throughout the several views and in which:

Patented Jan. 13, 1959 ice Fig. 1 is a perspective view of the inventionshown mounted on and in connection with a detail perspective view of aportion of an ore crushing and handling machine;

Fig. 2 is an end elevation view of the present invention shown mountedon a broken away detail portion of the ore crushing machine and beingviewed from the side of the ore crushing machine opposite to that shownin Fig. 1;

Fig. 3 is a detail elevation view partly in vertical section whereinportions of the mechanism are removed for clarity and showing certainother portions broken away to show detail;

Fig. 4 is a detail section view taken on a vertical plane substantiallyas indicated at 44 of Fig. 3; and

Fig. 5 is a detail section view taken on a substantially vertical planeas indicated at 55 of Fig. 1 and showing certain of the operatingelements in different operating relationship than shown in Fig. 1.

One embodiment of the present invention is shown in the accompanyingfigures and is described herein.

The invention is adapted for use with an ore-crushing machine, a portionof which is shown in Figs. 1 and 2 and indicated in general by numeral10. The ore-crushing machine has a frame portion 11 for carrying thevarious operating portions of the ore-crushing machine such as theore-crushing roll 12 which has a substantially cylindrical outer workingsurface 13 and which cooperates with another similar roll for crushingchunks of ore passing therebetween. The roll 13 is provided with ayieldable mounting to permit limited movement thereof. The mounting forroll 12 includes a pillow block 14 which provides a bearing for the endof the mounting shaft 15 to which roll 12 is afiixed. Pillow block 14 ismovably mounted on frame 11 but is continuously resiliently urged to itsnormal position as by coil springs 16. Pillow block 14 is provided witha plurality of tapped holes 17 for receiving cap screws which hold acover plate thereon which normally, during the operationof the orecrushing machine, encloses the end of shaft 15.

The present invention comprises an attachment for the ore-crushingmachine 10 and includes a supporting structure indicated in general bynumeral 18. Supporting structure 18 includes attachment means adaptedfor clamping connection with the frame 11 of machine 10, which means, inthe form shown, comprise a clamp 19 having adjustable set screws 20which comprise one of the jaws of clamp 19. Clamp 19 has a mountingbracket 21 affixed thereto. A pair of mounting rings 22 are formedintegrally of bracket 21 and are disposed in spaced relation andalignment with each other. The supporting structure 18 also includes arigid mounting shaft or rod 23 which extends through the alignedmounting rings 22 and is adjustably fixed with respect to the mountingrings by set screws 24 which are carried in suitably tapped holes in themounting rings.

Rod 23 may be shifted upwardly and downwardly and may be swung about itslongitudinal axis relative to bracket 21 and frame 11. Rod 23 has amounting ring 25 formed on the upper end thereof and is adapted toreceive the stub shaft 26 therethrough. Shaft 26 is.

tending flanges 29 and 38. Each of the sets of flanges 29 and 30 faceeach other and thereby define a track.

Means are provided for removably mounting the wire controlling andfeeding head 31 on mounting 28. In the form shown, a pair of mountingelements 32 and 33 are disposed on opposite sides of the mounting 28adjacent the flanges 29 and 38 respectively. Mounting elements 32 and 33comprise, in the form shown, angle irons A connecting and mounting plate"34 is affixed as by bolts 35 to the upper end portions of mountingelements 32 and 33 and plate 34 overlies the upper flanges 29 and 38 ofmounting 28, thereby interconnecting the mounting elements 32 and 33.The support for head 31, which includes mounting elements 32 and 33 andinterconnecting plate 34 is movably supported on the track defined byflanges 29 and 38 by rollers 36 and 37 which are respectively journalledon opposite sides of the mounting 28 and on the mounting elements 32 and33. Bolts 38 and 39 are mounted in the mounting elements 32 and 33 forcarrying the respective rollers 36 and 37 thereon. The peripheralsurfaces of rollers 36 and 37 respectively engage the lower flanges 29and 3t). Rollers 36 and 37 are of the flanged type so as to be guidedalong the tracks defined by flanges 29 and 30 to thereby restricttransverse movement of the head mounting relative to mounting 28.

A pair of mounting rings 40 are fixedly secured as by welding to theplate 34 for adjustably receiving and supporting the head mounting shaft41 therein. Mounting rings 48 are provided with set screws 42 forengaging and retaining mounting shaft 41 in a desired position. Thesupporting framework of head 31 is carried on mounting shaft 41 and isclamped thereto by means of a cradle 43 which surrounds shaft 41 and issecured to the head 31 as by bolts 44. Head 31 may be adjusted along thelength of shaft 41 or may be rotated slightly about the axis thereof tobe properly positioned. Head 3]. is of a conventional type adapted tocontinuously feed as by driving elements 4-5, a welding wire 46therethrough. Head 31 is provided with driving motors 47 and 48 whichare respectively adapted for A. C. and D. C. operation so as tofacilitate use of the continuously feeding head 31 without regard to thenature of the power available. The head 31 has a control 59 adapted tovary the speed at which the wire 46 is fed therethrough. A guidingsheath 58 extends downwardly from head 31 to guide the wire 46 towardthe peripheral surface 13 of roll 12. An electrical coupling 51 iscarried on the lower end of guiding sleeve and is connected to acurrent-supplying bus 52 which may be connected to a conventional stylewelding machine adapted to supply weld current therethrough.

Connector 51 provides a sliding electrical connection to wire 46 inclose proximity with the lower end of the wire so as to maintain powerloss due to resistance in wire 46 at a minimum. Wire 46 is of aconventional type used in welding and may be supplied in a roll andsuitably mounted on the ore crushing machine.

Driving means are provided for moving the wire-feeding head 31longitudinally along mounting 28 as the roll 12 is rotated. In the formshown, such means include a pair of sprockets 53 and 54 which arerespectively journalled at the outer and inner ends of mounting 28. Aroller chain 55 is trained around sprockets 53 and 54 and is disposedbetween the flanges 30 and adjacent the roller 37. Connecting means areprovided for attaching the head mounting to chain 55 and in the formshown, a

slide 56 is vertically shiftably mounted on the inner side of the angleiron 33 and is provided with a pair of upper and lower engaging pins orlugs 57 and 58 which are adapted to extend into links of chain 55. Amounting bolt 59 extends through an elongated opening 60 in angle iron33 and is atlixed as in a tapped aperture 60 in slide 56. Guides 61 maybe aflixed on the inner side of angle iron 33 for guiding the verticalmovement of slide 56. The driving means also include a driving element62 which is mounted for swinging oscillation relative to the rotationaxis of sprocket 54. Driving element 62 also is connected with thesprocket 54 by means providing a unidirectional driving connection so asto drive sprocket 54 when driving element 62 is moved in one directionand then releasing the connection when drive element 62 is moved inanother direction. In the form shown, a hub 63 is affixed to sprocket 54and is provided with a recessed portion 64 in which a roller bearing 65is mounted. A retaining and driving ring 66 surrounds the periphery ofhub 63 and encloses bearing 65 therebetween. Ring 66 is aflixed todriving element 62 for oscillation therewith. As seen in Fig. 3, drivingconnection is provided between driving element 62 and sprocket 54 whendriving element 62 is swung upwardly. Driving element 62 is swingablyconnected to a connecting rod 67 which is adjustably and swingablyconnected to an oscillating arm 68 which has a plurality of spacedapertures 69 along the length there of for mounting connecting rod 67therein. Arm 68 is swingably connected by a cap screw 70 mounted in oneof the tapped apertures of the pillow block 14. An actuating element orcam follower 71 is secured to the oscillating arm 68, as by bolts, andis provided with a plurality of apertures 72 to permit adjusting of theposition of follower 71 with respect to arm 68. As best seen in Fig. 5cam means are provided for driving the oscillating arm 68 and driveelement 62 and in the form shown, such means include a cam actuator 73comprising a sleeve rotatably mounted on a mounting stub 74 which isthreadably secured to the end of roll shaft 15 in eccentric relationwith the rotation axis thereof. Cam actuator 73 will rotate with shaft15 and engage cam follower 71, as best seen in Fig.5.

Means are provided for securing a positive ground connection to roll 12and in the form shown a conductor 75 is adapted for connection withanother terminal of the welding machine or the ground terminal. Bus 75is connected to the stator 76 of an electrical rotary coupling. Therotor 77 of the coupling is connected with the stator 76 in electricalconducting relation and is mounted coaxially of the rotation axis ofroll shaft 15. Rotor 77 is secured to the lug 74 by an interconnectiondisc 78. The electrical connecting bus 75 is thereby securely andpositively electrically connected to the roll 12.

Driving means are provided for driving the roll 12 at a controllable andslow speed. In the form shown, as best seen in Fig. 2, the driving beltpulleys 79 are disconnected from their wheel driving belts and anauxiliary source of rotary power indicated in general by numeral 88 isconnected thereto. The auxiliary source of power includes a base 81having a motor 82 mounted thereon which is drivingly connected to acontrollable speedchanging mechanism 83 having a manual speed-changingcontrol 84. The speed-changing mechanism 83 is coupled to aspeed-reducing mechanism 85 for very substantially reducing the speed ofthe rotary power. The driving shaft 86 of speed reducer 85 has a drivepulley 87 keyed thereto over which is trained a driving belt 88 which isalso trained over the driving pulley 79 of roller 12. Suitable means areprovided for maintaining the tension on belt 88 and in the form shownsuch means comprise a controllably extendible member 89 such as amechanical jack bearing against the base 81 and frame 11 of ore crushingmachine 10.

Operation In operation, the motor 82 drives the roll 12 at a slow speed.The weld current will then be supplied through conductor 52 and the wirefeeding head will be started by actuating one of the driving motorsthereof so as to form a welded head on the outer periphery surface ofroll 12. As the roll 12 and mounted shaft 15 are rotated, theeccentrically disposed c amming element 73 engages the cam follower 71,as seen in Fig. 5, and will urgeoscillating arm 68 and drive element 62upwardly to produce rotation of sprocket 54 and movement of chainessence 55. As the upper run of chain 55 is moved to the left, as seenin Fig. 1, the wire feeding head 31 will be incrementally moved to theleft along mounting 28. When cam actuator 73 has again rotated out ofengagement with cam follower 71, drive element 62 will fall downwardlyto be ready for subsequent driving operation. With continued rotation ofroller 12 and shaft 15, the wire feeding head 31 will be moved in stepsin a direction longitudinally of the roll 12 so as to cause the wire 46to be moved in a similar manner, thereby forming sub stantially completecovering of metal on the peripheral surface of the roll 12. If theupward control mechanism 83 is adjusted by turning hand control 84, therotation speed of roll 12 will be changed and the quantity of weld metalapplied to the surface 13 is changed so as to either thicken or thin thequantity of material being applied. It is desirable that the wirefeeding head 31 and wire 46 move approximately a quarter of an inch foreach revolution of roll 12. This may be adjused by ad justed byadjustably repositioning the connection between connecting rod 6 7 andoscillating arm 68 to thereby effectively change the magnitude of strokeof drive arm 62. Adjustment of the magnitude of driving increment mayalso be changed by repositioning the cam follower 71 with respect tooscillating arm 68 and actuator 73.

The present invention may be applied to many different types ofmechanisms employing such rolls as shown in the ore crusher 10, for thepurpose of resurfacing such rolls. The supporting structure 18 may beadjusted in multi-directions so as to permit the head 31 to beconveniently disposed in the proper position relative to a roll to beresurfaced, regardless of the manner in which the supporting structuremust be mounted on the machine frame. It will be seen that the head 31may be moved longitudinally or arcuately relative to mounting shaft 41and furthermore the mounting 28 may be moved longitudinally of orthrough an arc about the rotation axis of stub shaft 26. Furthermore,the mounting 28 may be rotated about the rotation axis of shaft 23 andalso may be moved upwardly or downwardly or toward and away from theroll surface by moving rod 23 with respect to the retaining rings 22.

It should be seen that I have provided a new and improved apparatus forreadily and easily resurfacing the building up of the working surface ofa crusher roll without necessitating removal of the roll from thecrusher machine.

It will also be apparent that I have provided a new and improved methodof servicing the working cylindrical surface of a crusher roll byapplying a controllable and variable auxiliary source of rotary power tothe roll for turning the same and then forming a weld bead spirally onthe working cylindrical working surface and on one end thereof to theother.

It will, of course, be understood that various changes may be made inthe form, detail, arrangement and proportion of the parts withoutdeparting from the scope of my invention which consists of the matterdescribed herein and set forth in the appended claims.

What is claimed is:

1. In apparatus for refacing a substantially-cylindrical surface of acrusher roll in an ore crushing machine, said apparatus comprisingattachment means adapted for clamping connection to the frame of such amachine, an elongated mounting extending longitudinally substantiallyaxially of the roll and adjacent the cylindrical surface thereof, saidmounting being adjustably secured to the attachment means for adjustmentin multi-directions, a supply of welding wire, a wire controlling andfeeding head engaging the wire in driving relation and being constructedand arranged for driving the wire toward the surface of such a roll,said head being movably mounted on said mounting and being movablelongitudinally thereof and longitudinally of the roll, electricalconducting means connected in conducting relation with said wireadjacent the roll and being adapted for connection to a source ofwelding current, drive means carried by said mounting and being operablyconnected with said head in drive relation, said driving means beingconstructed and arranged for moving said head along said mounting whensaid driving means is operated, and said driving means including anadjustably tendable oscillatory driving connection adapted for drivingconnection with the roll and being constructed and arranged foroperating said drive means when said roll is rotated, whereby tofacilitate application of the apparatus to machines of difierenttypesand to progressively move the head and welding wire axially of theroller as the latter is rotatedto thereby form a substantially spirallydisposed weld bead on the roll surface from one end thereof to the otherend.

2. In apparatus for refacing a substantially cylindrical working surfaceof a crusher roller in an ore crushing machine, said apparatuscomprising an elongated mounting extending substantially axially of theroll and adjacent the cylindrical working surface thereof, saidelongated mounting having attachment means adapted for clampingconnection with the frame of such a machine, a supply of welding wirehaving an end disposed in close proximity with such a working surface ofthe roll, a wire-controlling and feeding head engaging the wire indriving relation and being constructed and arranged for driving the wiretoward the surface of such a roll, said head being movably mounted onsaid elongated mounting, and adapted for movement longitudinally thereofand axially of the roller, oscillatory drive means carried by saidmounting and being operatively connected with said head in driverelation, said driving means being constructed and arranged for movingsaid head along said mounting, and said drive means including a movableand adjustably extendible driving element and a cam follower adjustablyconnected to the driving element, stationary means engaging said drivingelement and being constructed and arranged for guiding the same, and acam element secured on the roll and positioned adjacent the camfollower, said cam element being eccentrically disposed relative to therotation axis of said roll for periodically drivably moving said drivingelement as the roll is revolved whereby to operate said driving meansand progressively move feeding head along said mounting from one end ofthe roll of the other end thereof.

3. In apparatus for refacing the cylindrical working surface of acrusher roll in an ore crushing machine, said apparatus comprising asupporting structure having attachment means adapted for clampingconnection with the frame of such a machine, said supporting structureincluding a track spaced from such a working surface of the roll andextending substantially axially of the roll, a supply of welding wirehaving an end portion disposed in close proximity with the workingsurface of such a roll, a wire controlling and feeding head drivablyconnected with said wire and constructed and arranged for driving thewire toward the surface of such a roll, said head being movably mountedon said track for movement longitudinally thereof and in an axialdirection relative to the roller from one end thereof to the other endthereof, electrically conducting means connected in conducting relationwith said wire adjacent the roll and being adapted for connection to asource of welding current, an adjustable driving element mounted on saidsupporting structure for oscillatory movement, said driving elementhaving unidirectional driving connection with said feeding head forprogressively moving the same along the track when said driving elementis oscillated, means attachable to the frame of the ore crushing machinefor guiding the driving element, a cam actuator securable to such a rolland positioned eccentrically of the rotation axis thereof, a camfollower secured to said driving element and drivably associated withsaid cam actuator to be oscillated thereby when said roll is rotated,whereby to drivably oscillate said driving element when said roll isrotated to thereby form a .continuously welded bead peripherally aroundthe working surface of the roll and from one end thereof to the other.

4. The structure recited in claim 3 and including a variable speedauxiliary source of rotary power adapted for driving connection withsaid roll for rotating the same, whereby the rotation speed of the rollmay be changed to vary the quantity of metal applied on the rollsurface.

5. The structure recited in claim 3 wherein said driving element alsohas a reversible connection with said feeding head, whereby to move saidhead in either axial direction relative to the roller and thereby permitapplication of a welding bead toward one end and then toward the otherend of the roll.

6. In apparatus for resurfacing a substantially cylindrical surface of acrusher roll in an ore-crushing machine, said apparatus comprising anelongated mounting extending longitudinally of the roll and adjacent thecylindrical surface thereof, attachment means on the mounting andeffecting a temporary, but rigid connection to the frame of such amachine, a supply of welding wire, a wire-controlling and feeding headengaging the wire in driving relation and being constructed and arrangedfor driving the wire toward the surface of such a roll, said head beingmovably mounted on said mounting and being movable longitudinallythereof and longitudinally of the roll, drive means for moving the headlongitudinally of the mounting and including a movable drive element onthe mounting and extending throughout the length thereof, said driveelement being coupled with the head for progressively moving the headfrom one end of the mounting to the other and said drive means alsoincluding an operating member for moving said drive element and therebyeffecting movement of the head, means on the mounting and confining thedrive element throughout its length against exposure to the surface ofthe roll and the spattering of weld metal during application of the weldmetal to the roll surface, electrical conducting means connected inconducting rela tion with the wire adjacent the roll and being adaptedfor connection to a source of welding current, a variable speedauxiliary source of rotary power adapted for con nection with thecrusher roll for rotating the same, whereby to facilitate application ofa continuous, substantially helical bead of weld metal to the surface ofthe crusher roll without interruption.

References Cited in the file of this patent UNITED STATES PATENTS129,238 Krorn July 16, 1872 759,644 Sturtevant May 10, 1904 759,931Sturtevant May 17, 1904 1,886,503 Shockey, Nov. 8, 1932 2,187,837Paasche Jan. 23, 1940 2,213,002 Hall Aug. 27, 1940 2,299,747 Hotter Oct.27, 1942 2,427,350 Carpenter et al Sept. 16, 1947 2,726,628 AllenbaughDec. 13, 1955

